Home Chemistry S and P - Block Elements (S - Block Elements Not In Syllabus ) Alkali Metals Which of the following statements is not cor…
Chemistry S and P - Block Elements (S - Block Elements Not In Syllabus ) Alkali Metals Single Correct MCQ
Published on: August 14, 2026

Which of the following statements is not correct regarding preparation of NaOH?

A
NaOH is prepared by electrolysis of sodium chloride in Castner – Kellner cell.
B
Sodium metal discharged at cathode combines with mercury to form sodium amalgam.
C
Chlorine is evolved at anode.
D
Amalgam is heated to separate Na and Hg.

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Verified by Experts
The correct answer is:
D

Amalgam is treated with water to give sodium hydroxide and hydrogen gas.

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